if (document.images) {
         // Side Navigation Button mouse off Preload 1-9
         img1off = new Image();
         img1off.src = "images/buthomeoff.gif";
         img2off = new Image();
         img2off.src = "images/butlinkoff.gif";
         img3off = new Image();
         img3off.src = "images/butcdoff.gif";
         img4off = new Image();
         img4off.src = "images/butcdoff.gif";
         img5off = new Image();
         img5off.src = "images/butmailoff.gif";
         img6off = new Image();
         img6off.src = "images/butrevoff.gif";
         img7off = new Image();
         img7off.src = "images/butgaloff.gif";
         img8off = new Image();
         img8off.src = "images/butnewsoff.gif";
         // Side Navigation Button mouse on Preload 1-9
         img1on = new Image();
         img1on.src = "images/buthomeon.gif";
         img2on = new Image();
         img2on.src = "images/butlinkon.gif";
         img3on = new Image();
         img3on.src = "images/butcdon.gif";
         img4on = new Image();
         img4on.src = "images/butcdon.gif";
         img5on = new Image();
         img5on.src = "images/butmailon.gif";
         img6on = new Image();
         img6on.src = "images/butrevon.gif";
         img7on = new Image();
         img7on.src = "images/butgalon.gif";
         img8on = new Image();
         img8on.src = "images/butnewson.gif";
          }
      function imgon(id){
         document.getElementById(id).setAttribute('src', eval(id + "on.src"));
         }
      function imgoff(id){
         document.getElementById(id).setAttribute('src', eval(id + "off.src"));
         }